Most threats are online indeed, so it makes the most sense to store your passwords offline. However, doing so in a notebook labeled "password minder" is the off

Most threats are online indeed, so it makes the most sense to store your passwords offline. However, doing so in a notebook labeled "password minder" is the offline equivalent of a honey pot. But if you buy a cheap pulp novel, small enough to carry around, and write your passwords in the margins, that would take you a long way.